Hi all,
I have several questions Regarding vMotion and EVC, can somebody help ?
1. If i mix several CPU types(from same CPU vendor) in a vSphere cluster without EVC enabled, what will happen ? can i vMotion VM's across the hosts ?
2. Can i vMotion VM's from the Cluster with older CPU to the Cluster with newer CPU ? Suppose EVC is not enabled on both Clusters.
3. Can i vMotion VM's from the Cluster with older CPU to the Cluster with newer CPU ? Suppose EVC is not enabled on the source Cluster, but enabled on the destination Cluster.
4. Can i vMotion VM's from the Cluster with older CPU to the Cluster with newer CPU ? Suppose EVC is enabled on the source Cluster, but not enabled on the destination Cluster.
5 Can i vMotion VM's from a standalone ESXi host to a EVC enabled cluster ? Suppose the CPU's are same.
6 From the KB "EVC and CPU Compatibility FAQ" below, if we disable EVC on a cluster, the VM's can only be migrated to the hosts with same or older CPU's.
Why virtual machines is only able to move to other ESX/ESXi hosts that are at the same CPU generation or older ? This is opposite to my cognition.
VMware KB: EVC and CPU Compatibility FAQ
What is the impact on vSphere Cluster Features when I disable the EVC mode?
When disabling EVC mode on a cluster, it affects vSphere Cluster Features in the following ways:
- vSphere HA (High Availability): vSphere HA is not impacted due to the failover power-cycling the virtual machines when starting them on a a new host. This allows the virtual machine to pick up the new CPU ID and allows it to start without a problem
- vSphere DRS (Distributed Resource Scheduler):
- vMotion: Virtual machines is only able to move to other ESX/ESXi hosts that are at the same CPU generation or older. If DRS is configured for Fully Automated, this can result in virtual machines eventually being migrated to hosts in the cluster with the oldest CPU generation where they are unable to be moved via vMotion to different hosts with a newer CPU generation.
- Storage vMotion: Virtual machines are able to be moved to Storage vMotion with EVC mode disabled within a cluster
- Swapfile Location: This is not impacted.
Thank you.